The following is an audio from the original radio program "Light Your Lamps" entitled "Signs of Our Times" broadcasted on January 26, 1947, according to the person who uploaded this audio.

As far as I know, Ven. Sheen never claimed to have received any private revelation but he was a well educated Cardinal so his remarks regarding the Antichrist are his personal, well educated eschatological opinions on the matter. He may have well read the Saints and Blesseds on the matter.